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Commit 015f630d authored by Jean-Francois Moine's avatar Jean-Francois Moine Committed by Mark Brown
Browse files

ASoC: simple-card: Add DT documentation for multi-DAI links 



Many couples of CPU/CODEC DAI links may be described in the DT
thanks to 'simple-audio-card,dai-link' containers.

Signed-off-by: default avatarJean-Francois Moine <moinejf@free.fr>
Signed-off-by: default avatarMark Brown <broonie@linaro.org>
parent cf7dc23c

Documentation/devicetree/bindings/sound/simple-card.txt

+41 −1
Original line number Original line Diff line number Diff line
@@ -23,6 +23,11 @@ Optional properties: 




Required subnodes:

Required subnodes:





- simple-audio-card,dai-link		: container for the CPU and CODEC sub-nodes

					  This container may be omitted when the

					  card has only one DAI link.

					  See the examples.



- simple-audio-card,cpu			: CPU   sub-node

- simple-audio-card,cpu			: CPU   sub-node

- simple-audio-card,codec		: CODEC sub-node

- simple-audio-card,codec		: CODEC sub-node
@@ -49,7 +54,7 @@ Note: 
   CPU and CODEC sides as we need to keep the settings identical for both ends

   CPU and CODEC sides as we need to keep the settings identical for both ends

   of the link.

   of the link.





Example:

Example 1 - single DAI link:





sound {

sound {

	compatible = "simple-audio-card";

	compatible = "simple-audio-card";
@@ -94,3 +99,38 @@ sh_fsi2: sh_fsi2@ec230000 { 
	interrupt-parent = <&gic>;

	interrupt-parent = <&gic>;

	interrupts = <0 146 0x4>;

	interrupts = <0 146 0x4>;

};

};



Example 2 - many DAI links:



sound {

	compatible = "simple-audio-card";

	simple-audio-card,name = "Cubox Audio";

	simple-audio-card,format = "i2s";



	simple-audio-card,dai-link@0 {		/* I2S - HDMI */

		simple-audio-card,cpu {

			sound-dai = <&audio1 0>;

		};

		simple-audio-card,codec {

			sound-dai = <&tda998x 0>;

		};

	};



	simple-audio-card,dai-link@1 {		/* S/PDIF - HDMI */

		simple-audio-card,cpu {

			sound-dai = <&audio1 1>;

		};

		simple-audio-card,codec {

			sound-dai = <&tda998x 1>;

		};

	};



	simple-audio-card,dai-link@2 {		/* S/PDIF - S/PDIF */

		simple-audio-card,cpu {

			sound-dai = <&audio1 1>;

		};

		simple-audio-card,codec {

			sound-dai = <&spdif_codec>;

		};

	};

};